Engine Coolant Thermostat Assembly

The Wahler 1122030275 is an OE-quality engine coolant thermostat assembly manufactured in Germany, designed to regulate the flow of coolant through your Mercedes-Benz engine. This thermostat assembly is a critical wear item that ensures your engine warms up quickly and maintains its optimal operating temperature. A failed thermostat can cause significant issues: if stuck open, it leads to an engine that never reaches temperature, resulting in poor fuel economy and potential catalytic converter damage; if stuck closed, it causes rapid overheating, which can lead to catastrophic engine failure. This Wahler unit includes a replacement seal for a complete and easy installation. Wahler is a leading OEM manufacturer of thermal solutions for many European automotive brands, including Mercedes-Benz, BMW, and Audi, ensuring that their aftermarket parts are identical in quality and performance to the original components. This thermostat operates at 87 degrees Celsius. This thermostat is designed to fit a wide range of Mercedes-Benz models, including the C280, C43 AMG, CLK320, E320, and more, from model years approximately 1998 through 2005. Specific fitment includes vehicles equipped with M112 and M113 engines. The full list of compatible vehicles and engine configurations is extensive and detailed in the product's fitment guide.